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M. DE CAMPO.

ROTARY ENGINE.

APPLICATION FILED JAN. 7. ma

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M. DE CAMPO.

ROTARY ENGINE.

APPLICATION FILED JAN. 7. 1918.

1,310,157. Patented July 15, 1919.

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MANUEL DE CAMPO, OF MEXICO, MEXTGO.

ROTARY ENGINE.

Specification of Letters Patent.

Patented July 15, 1919.

Application filed January '7, 1918. Serial No. 210,715.

To all whom it may concern:

Be it known that I, MAN EL on (harm, a citizen of Mexico, and a resident of Mexico city, Mexico, have invented a new and Improved Rotary Engine, of which the-following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are 1: to increase the horse-power efficiency; to prevent leakage of the power medium past the rotor; to slmplify the construction; and to reduce the cost of constructlon.

. Drawings.

Figure 1 is a cross section of an engine constructed and arranged in accordance with the present invention, the same being taken as on the line 11 in Fig 2;

Fig. 2 is a longitudinal section of the same, the section being taken as on the line 2-2 in Fig. 1;

Fig. 3 is a horizontal the section being taken in Fig. 1;

Fig. 4 is a detail view showing an end of the piston with which the present invention is provided.

section of the'same, as on the line 3'3 Description.

As seen in the drawings, an engine constructed and arranged in accordance with the present invention has a cylinder 9, the inner surface 10 whereof is platted or milled 'in correspondence with the path of the center of the packing strips 11 with which the piston 12 is equipped at the longitudinal ridges thereof. The path of the said packing strips is controlled by the disposition of the driving shaft 13 which is eccentric to the cylinder 9, as seen best in Fig. 1 of the drawings.

The piston 12 is hollow and has curved side walls terminating at the ridge of the said piston where are disposed the packing strips 11. The curvature of the side walls j corresponds with the curvature of the inner surface 10 of the plston 9 extending between the inlet ports 14 and the outlet ports 15 thereof. The centers of the ports 14 and 15 are in the same plane as the axis of the driving shaft 18. Hence when the cylinder is disposed with the packing rings 11 registering with said ports 14 and 15, as seen in Fig. 1 of the drawings, a clearance indicated by the numeral 16 is formed between the inner surface 10 of the cylinder 9 and the outer surface of the curved wall of the piston 12, which excludes therefrom approximately all of the inert gases following an exploslon, and thus prepares the engine for receiving a fresh charge of explosive fuel as the packing strips 11 covering the inlet ports pass the same;

To permit the movement necessary for the piston relative to the shaft 13, the shaft has a series of rollers 17 and 18. The said rollers are disposed in paired arrangement as shown best in Fig. 3 of the drawings, said rollers being all pivoted in bearings on shafts 19, the ends whereof are threaded to receive retaining screw-nuts 20, said shafts being passed through the ends of bracket plates 23. As shown best in Fig. 2 of the drawings, the different pairs of rollers track on oppositely disposed ribs 21 and 22. The ribs 21 and 22 are disposed in mutually staggered relation. As a result of this construction, the respective rollers bear lightly but firmly on the webs assigned thereto. In this manner though the support of the piston on the unnecessary friction in the construction is avoided.

The piston 12 is preferably constructed from corresponding half-sections. As seen best in Fig. 1 of the drawings, the sections are united by screws 24. Each half section carries a half portion of the ribs 21 and 22. When the two half sections are drawn together, the joints between the ribs 21 and 22 are completely and neatly sealed.

As seen in Fig 4 of the drawings the pistons 12 when united provides annular grooves 25, which grooves are divided by the longitudinal grooves 26 wherein the packing strips 11 rest in service. The grooves 26 divide the grooves 25 in the same manner as the strips 11 divide the strips 27. The strips 11 in service are held against the curved inner surface 10 of the cylinder 9, while the strips 27 are held against the surface of the heads 28 of the cylinder 9, as shown best in Fig. 2 of the drawings. Combined, the strips 11 and 27 form an unbroken check for the gases in the cylin der 9 to prevent the passage thereof from one side of the piston to the other.

The strips 11 are laminated and adapted to assume the shape best suited for contact with the inner surface 10 of the cylinder 9.

rollers 17 and 18 may be firm,

Any of the usual cushion or spring seats for said strips may be employed for holding the wearing surface thereof in contact with the wall of the cylinder.

It will be understood that any expansive material, such as steam, compressed air, expanding gases, or other fluid, may be employed as a motive power for the engine. A supply pipe 29 is connected with a power source, while an exhaust pipe 30 carries away the totally or partially insert expansive power medium.

When the power medium is steam or analogous material, it is admitted through the supply pipe 29 and the ports 14 to the cylinder 9, behind one or other of the strips 11 and the ridged edge of the piston with which the said strip is associated. The piston is moved in the direction indicated by the arrow in Fig. 1 of the drawings. As the piston moves in the direction indicated, it shifts its relation to the shaft 18, the major extension of the piston passing to the upper side of the said shaft while the minor extension passes below.

The piston is permitted thus to shift by reason that the rollers 17 and 18 track on the ribs Q l and 22. In the extreme position which is perpendicular to that shown in Fig. 1 of the drawings, one set of rollers 17 and 18 will be found adjacent one end of the said ribs, and as the piston continues to turn, the relative position of the shaft and piston recurs to that shown in Fig. 5, where the second strip 11 operates to determine the supply of power medium momentarily, until in its turn the said strip is carried past the ports 14, when the power medium initiates a pressure on the piston back of the said second strip and on the opposite side of the piston to that formerly receiving the power pressure. The spent or inert power medium which operates in the previous hclf cycle of the piston to rotate the same, is now ejected from the cylinder 9, through the exhaust ports 15 and exhaust pipe 80. This action is due to the fact that simultaneously the first-mentioned packing strip 11 and the ridge of the piston associated therewith pass the exhaust ports 15, when the second-mentioned packing strip passes the intake ports 14:. The above-denoted first pressure side of the piston 12 now becomes a pressure member for ejecting the spent or inert power medium which is displaced from the cylinder 9 and carried through the open ports 15 and pipe 30,

Copies of this patent may be obtained for five cents each, by addressing the said pipe and ports offering a less resistance than the clearance space 16.

From the foregoing it is obvious that the piston imparts to the shaft 13, two impulses with every complete revolution of the said shaft, and that the spent or inert medium is freely, and with little or no back pressure, ejected from the cylinder after having performed its oflice. Further, it is obvious that the interval between the power strokes which corresponds with the passage of each of the packing strips 11 across the intake ports 14, is so inapprecia'ble that vibrations due to variation in power impulses is materially, if not completely, eliminated.

While the engine has been shown in the accompanying drawings and described in the present specification as employing an expansive or power medium vitalized exteriorly to the cylinder 9, it will be understood that under proper conditions, the en-- gine could employ an explosive fuel under pressure, the expansion whereof is induced by explosions produced within the cylinder. To effect this, it would only require a timing valve for opening and closing the ports 14: in correspondence with the operation of an ignition mechanism for the gases at the moment of greatest eiiiciency with respect to the piston 12 and the travel thereof.

Claim.

An engine comprising a cylinder; a rotary piston, the sides whereof are curved in correspondence with the wall of said cylinder, said piston having a long and ashort diameter in cross section, the long diameter corresponding approximately with the diameter of said cylinder and the length of said piston corresponding approximately with-the length of said cylinder; aplurality of packing members mounted on said piston at the opposite ends of the longer diameter thereof and at the opposite ends thereof; a driving shaft extended lengthwise of said cylinder, the axis of said shaft being eccentric to the axis of said cylinder; and means movably connecting said piston and said shaft for permitting the movement of said piston on said shaft in a plane coincident with the longer diameter of said piston, said means embodying a plurality of ribs internally extended within said piston in parallel relation, and rollers mounted in bearings formed in bracketed supports.

MANUEL nn G'AMPO.

Commissioner of Patents.

Washington, I). 0. 

